I bought a B&R 21" U-21NX. It does NOT fit in the CRJ 200 overhead. The exterior telescoping handle keeps it from fitting.

I ended up giving the bag to my wife. It is awesome. No matter what happens to it, they fix it, period, for the lifetime of the bag.

I bought a PNS bag and love it. 3.5 years later everything still works. Warranty isn't as good as the B&R, but the PNS bags are built tougher. If I had the choice I'd go with the B&R bag as it's lighter.